Adverse effects of Haloperidol...
As haloperidol is a high-potency typical antipsychotic, it tends to produce significant extrapyramidal side effects. According to a 2013 meta-analysis of the comparative efficacy and tolerability of 15 antipsychotic drugs it was the most prone of the 15 for causing extrapyramidal side effects.
With more than 6 months of use 14% percent of users gain weight. Common (>1% incidence) - Extrapyramidal side effects including:
- Dystonia (continuous spasms and muscle contractions)
- Muscle rigidity
- Akathisia (motor restlessness)
- Parkinsonism (characteristic symptoms such as rigidity)
- Hypotension
- Anticholinergic side effects such as: (These adverse effects are more common than with lower-potency typical antipsychotics, such as chlorpromazine and thioridazine.)
- Constipation
- Dry mouth
- Blurred vision
- Somnolence (which is not a particularly prominent side effect, as is supported by the results of the aforementioned meta-analysis.
Procyclidene is prescribed to counteract the above side effects which are caused by haloperidol... https://en.wikipedia.org/wiki/Procyclidine
Dr Angeloglou suspected that Sheila wasn't taking her procyclidene, so perhaps this could be the reason for haloperidol's side effects becoming dominant... muscle rigidity, Akathisia, Parkinsonism, and somnolence; eg. Sheila walking stiffly through a gaggle of geese, her clumsiness with food preparation, and her drowsiness...
But is there any expert evidence that SC suffered any of these side effects? I've only seen the info you posted above about feeling sleepy and "flattened" elsewhere but this, I think, relates to when she was being prescribed 200mg dose. I'm taking anti-inflammatory tablets at the moment, Naproxen, for what is believed to be a rotator cuff injury probably from working out with weights. The instruction leaflet contains all manner of possible side effects but so far I've noticed nothing and don't expect to. It's just the pharma companies covering themselves.
The Foakes and Jean Boutell had known SC from childhood and observed her shortly before the murders all said she seemed 'normal'. If SC had all these problems with motor control then I'm at a loss to explain her appearance in terms of shaped eyebrows, manicured and polished nails, hair free legs. She didn't have the means to pay for these services and no friend has ever come forward to to say they helped out.
AE saying SC couldn't put beans on toast and yet AE saw so little of SC she was unable to tell the fraternal twins apart.